It’s official: American Airlines is raising the fee it charges for checked bags by $5, becoming the latest U.S. carrier to make the move as rising fuel costs pressure airlines’ bottom lines.

American joins United, JetBlue and Delta, which made its increase official Wednesday, in raising the price of the first and second checked bags.

The Fort Worth carrier's move is unsurprising in an industry where competitors are quick to copy one another. The minimal consumer pushback to fee increases at JetBlue and United so far suggests consumers have become accustomed to paying for checked luggage a decade after the charge became widespread at major carriers.

“Like fares, baggage fees are set by the supply and demand for the product in the marketplace, and these changes are in line with what other U.S. competitors are charging,” American spokesman Matt Miller said.

American said it’s the first time it has increased checked bag fees since 2010, two years after the carrier became the first major U.S. airline to implement the charge at a time when gas prices were also on the rise.

Since then, the fee frenzy has only spread, with many airlines now charging a fee to select window or aisle seats, or to secure a better boarding position.

American’s fee increase will take effect for tickets purchased beginning Friday. The cost of the first checked bag will be $30 and, for a second checked bag, $40. Customers with elite status in American's AAdvantage frequent flier program, those with American-branded credit cards or those who booked fares in Premium Economy or above will continue to be eligible for free checked bags.

The Fort Worth-based carrier reported $1.2 billion in baggage fees in 2017, the highest among U.S. carriers which collectively brought in $4.6 billion in baggage fees last year.

The proliferation of fees has come as average fares dropped in recent years due to low fuel costs and increased competition from ultra-low-cost airlines like Spirit and Frontier that pioneered the unbundled low-fare, fee-heavy model.

With fuel prices up about 27 percent in the last year, according to Bloomberg, airline executives have insisted fares will have to rise to make up the added expense. But that hasn't happened so far, even as airlines scale back their growth plans, forcing carriers to look to other sources of revenue, like fees, to help make up the difference.

The issue has caught the attention of some federal lawmakers, who have discussed requiring the Department of Transportation to study the fairness of airline fees in proportion to the cost of providing the service as part of an upcoming Federal Aviation Administration reauthorization bill. It's unclear whether the fee provision will make it into the final version of the bill, which is due for a vote by Sept. 30.